title: Sub-optimal transthoracic echocardiographic imaging in clinical trials.
authors.forename: R J
authors.initials: RJ
authors.lastname: MacFadyen
mesh_terms: D002986:Clinical Trials as Topic; D004452:Echocardiography; D017548:Echocardiography, Transesophageal; D006801:Humans; D015203:Reproducibility of Results; D015983:Selection Bias